a. Functionally, how do closed-loop systems differ from open-loop system?
b. State one condition under which the error signal of a feedback control system would not be the difference between the input and
the output.
c. If the error signal is not the difference between the input and output, by what general name can we describe the error signal?
d. Name three major design criteria for control systems.
e. Name the two parts of a system's response.
f. Physically, what happens to a system that is unstable?
g. Instability is attributable to which part of the total response?